I. (ˈ)dī+ adjective
or di·acid·ic |dīə|sidik
Etymology: di- (I) + acid (adjective)
1. : able to react with two molecules of a monobasic acid or one of a dibasic acid to form a salt or ester — used especially of bases
2. : containing two hydrogen atoms replaceable by basic atoms or radicals — used especially of acid salts
II. (ˈ)dī+ noun
Etymology: International Scientific Vocabulary di- + acid (n.)
: an acid (as sulfuric acid or oxalic acid) having two acid hydrogen atoms